Buy Microsoft on Windows 8 Weakness: Pro

Microsoft's Windows 8 will likely have a slow roll out until there are more touchscreen tablets and ultrabooks to run it on, Nomura Securities' head of technology research said Monday on CNBC's "Squawk on the Street."

The new operating system is designed for tablets and other touchscreen devices and will not be "terribly seductive" to anyone using a traditional mouse and keyboard, Richard Sherlund said. With few touchscreen laptops and tablets outside of Apple products, there could be some negativity surrounding Windows 8 during the quarter, the analyst warned.

The key will be getting corporate users and those consumers who need to use Microsoft's Office product to upgrade.

Along with the expected disappointing rollout for Windows 8, earnings could pressure Microsoft shares this week. With the PC market in decline from tablet competition, reported revenues are likely to be down 6 percent to 7 percent, Sherlund warned.

"The sentiment will get more negative, and that will be a good opportunity," he said.